The patents in the sale cover technologies including
access, switching, routing, optical and voice communication
network devices, Spherix said in a statement today. Spherix
disclosed in a filing last week that it issued $60 million in
stock to acquire 101 Rockstar patents.

Rockstar, which also includes BlackBerry Ltd. (BBRY), Ericsson AB (ERICB)
and Sony Corp. (6758), was holding discussions in December to divest a
portion of the patents after struggling to find large licensing
deals for them, people with knowledge of the consortium’s plans
said last month. The group spent $4.5 billion on the portfolio
of 4,000 patents and applications from Nortel, once North
America’s largest phone-equipment maker.

Spherix, based in Tysons Corner, Virginia, is among a
growing number of publicly traded U.S. entities focused on
collecting and making money from technology patents. In July,
Spherix acquired its first piece of the Rockstar portfolio,
purchasing seven patents in mobile communications.